Manual tapping device



Dec. 14, 1943. N. M. MAR SILIUS MANUAL TAPPING DEVICE Filed April 20, 1943 4 Sheets-Sheet 1 jawwm NEWMAN M.MAR$|L|US D- 1943- N. M. MARSILIUS MANUAL TAPPING' DEVICE MW 9 1 O 2 l 1 w. A d 9 1 i F NEWMAN M. MARSILIUS Dec.14, 1943. N. M.'MARSlLlUS MANUAL TAPPING DEVICE Filed April 20, 1943 4 Sheets-Sheet 3 Mil JII"

- NEWMAN m. MARSILIUS .Dec. 14, 1943. N, M. MARSILIUS v MANUAL TAPPING DEVICE Filed April 20, 1943 4 Sheets-Sheet 4 PWM'VM uus NEWMAN M. MARSI Patented Dec. 14, 1943 anger;

iiwi'rso STATES PATENT orrica MANUAL TAPPING DEVICE Newman M. Marsilius, Bridgeport, Conn.

Application April 2c, 1943, Serial No. 433,727

4 Claims.

This invention relates to new and useful improvements in tapping means and has particular relation to a manual tapping device.

An object of the invention is to provide a manual tapping device. includin a table or work support and adjustable tap supporting means whereby the tap may be disposed over any selected portion of the table or work support thereby eliminating any necessity for the moving of the work about on the table or support.

Other objects and advantages of the invention will become apparent from a consideration of the following detailed description taken in connection with the accompanying drawings wherein a satisfactory embodiment of the invention is shown. However, it is to be understood that the invention is not limited to the details disclosed but includes all such variations and modifications as fall within the spirit of the invention and the scope of the appended claims.

In the drawings:

Fig. 1 is a front elevational view of the present manual tapping device;

Fig. 2 is a side elevational View thereof, a portion of the supporting legs being broken ed, and the view bein on a slightly larger scale;

Fig. 3 is a top plan view of the device on the scale of Fig. 2;

Fig. 4 is an enlarged sectional view taken as along the lin 3-4 of Fig. 2;

Fig. 5 is an enlarged detail sectional view takenas along the line 5-5 of Fig. 2;

Fig. 6 is an enlarged detail sectional View taken as along the line 6-6 of Fig. 2; and

Fig. 7 is an enlarged sectional view taken as along the plane of the line 1-! of Fig. 3.

Referring in detail to the drawings the improved manual tapping device of the invention includes a stand generally designated ill and comprising legs H and a table or work support l2 which may be provided with slots [3 or the like for the passage of a tapping tool should one pass entirely through a piece of work or which may be used for the securing of Work or wood blocks or the like in place and into which a tan may pass. Below support I2 the stand Ill may support blocks of wood or the like 14 having sockets l5 therein for the reception of extra and various sizes of tapping spindles as suggested at it in Fig. 1.

The rear of the table portion or support of the stand It is split as at IT and provided with ears or lugs I 8 through which pass a bolt or stud l9 threaded at the outer side of oneea'r into anut 20 and at the outer side of the other ear into a nut 2| having a handle or lever portion 22 rigid or integral therewith. Passing through the split portion of the table, and which portion is designated 23, i a vertical post 2 i the upper end of which is received in a tubular portion 25 of a bracket generally designated 26. Set screws or the like 21 serve to secure the bracket on the upper end of the post.

In addition to the tubular portion 25 the bracket 28 includes a head-like portion 28 having' a horizontally disposed groove 29 opening through one side thereof and adjustably receiv ing a horizontal arm 30. .Arm 39 has a longitudinally extending slot 3! passing therethrough from side to side and extending through uch slot are a pair of bolts 32 each passing entirely through the head-like portion 28 and each at one side thereof threaded into a nut 33. On the other ends of bolts 32, at the outer side of the arm 3!],- nuts 34 are threaded and such nuts are provided with rigid and preferably integral handles 35- whereby the nuts may be conveniently loosened and tightened for adjustment of the arm as will appear.

On loosening of nut 2| the vertical post 2t may be rotated about its longitudina1 axis to dispose the forward end of arm 30 inthe desired location over the table I2 and in addition means are provided for raising and lowering said post while the clamp comprising the split table portion is loose. For the purpose of such vertical adjustmerit a heavy jack screw is provided below and in vertical alignment with the lower end of the post and such screw is threaded through a nut 31 secured to. the rear mid-portions of the legs I l of stand I2 as by bolts 38 passing through end portions of a bar '39 carrying said nut.

A hand wheel 40 is secured to the screw toward the upper end of the latter as by means of a pin 4| or the like. A swivel connection is provided between the lower end of P st 24 and the upper end of screw 36 whereby the post may be adjusted about its vertical axis independent of anymovment of the screw and whereby the latter may be rotated without imparting rotary movement to the post. To the desire-dend (see Fig. 6) a disc 42 is secured to the upper end of the screw 36 by means of a screw 43 and a pin 44 has a tight fit in said disc, through which it passes andin the upper end of screw 36 whereby the said disc is fixed in position. m

A collar 45 is fastened to the lower end of the pbst 24; as-by screws-46', and this collar includes a lower internal flange portion 41 disposed about the upper end of screw 36 and below the disc 42 which latter comprises a head-like portion on the screw. Clearly the screw 35 and disc 42 may turn relative to the post 24 and collar 45 and it is equally clear that said post and collar may be turned relative to screw 36. However, the post and screw are connected and when the wheel 40 is rotatedto turn the screw 35 the latter is fed through the nut' 31 and the post 24 and parts mounted thereon are fed up or down with the screw and hand wheel depending on the direction in which the latter is turned.

In the forward end portion of the arm 30 isa vertical opening or passage 48 having bushings 49 and 50 disposed therein with the bushing Q.

within the bushing 49. (See particularly Fig. '7.) The bushings and one side ofthe arm 30 at the opening 48 have aligned openings and the opening 5! through the arm portion is tapped to receive a set screw 52.- A suitable tap spindle 53 passes through the bushings and at its lower end is provided With a suitable socket to receive the shank of a tap 54 which may be secured in place as by a set screw 55.- AsshoWn in Fig. '7 the screw 52 passes through both bushings 49 and 50 and clearly such screw may be tightenedagainst the spindle 53, a I a Normally this last is done only when the operator leaves the machine -for a time or perhaps when-inserting anew spindle or the like. Bush- 7 ing 55 is of an inner diameter to receive the spindle 53 .for turning movement in such bushing. Itwill be understood that thespindles are changed for different sizes of taps as one size to receive the spindle next insize or diameter to the, spindle which the bushing 59 is adapted p to receive. A passage 48a maybe provided in the other end of arm 30 for the reception of bushings and'tap spindles of other sizes when the'positioh of the armiis reversed as byrotating post 24 through a half turn. I

When using the machine of the invention the operator sets up hiswo'rk'on the table [2 and clamps the work in'anydesired or'suitable way. Thereafter the work need notbe moved until all planned tapping operations have been completed when" the work is removed and a new piece mountedon the table; Onloosening of the nuts 34 the horizontal 'arm 30 maybe moved or ad-' justed forwardly or rearwardly through the head portion 28 of the bracket 26 to dispose thetap 54 in the desired'location forwardly and rearwardly of the table. I

Somewhat similarly on loosening of nut 21 thesplit-tableportion is released from gripping relation with the vertical post24 and the latter may be, swung'about its own vertical axis to dispose thetap over any chosen part of the table on looseningof'nut 2| the post 24 may be raised or lowered by-pr0per turning of the wheel to and screw 35. 7

Thus the position of the tap overthe table l2 may be'adjusted for any particularjob and the tap may be moved from place to place fordifferent tapping operations-on the same piece of work, 5

thelatter remainingstationary in allcases. By

J2 from-side-to-side of the latter. In addition adjusting the arm 3% through the head portion 28 of bracket 26 the tap may be disposed over any part of work on the table and by vertical adjustment of the post the tap may be positioned for minimum vertical movement to and from the work. After any adjustments the nuts 34 and 2| are of course tightened.

The upper end of each spindle 53 is hollow or recessed as at 55 and in addition is notched as at 51. The recess 56 is to receive a pilot stud 58 on a crank arm 59 and the notch 5'! (which preferably is at each side of the spindle) is to receive a cross pin E9 on the pilot stud 58. Arm 5!! is provided with a handle 5! by means of which it may be used to rotate the spindle 53 and thus any tap mounted by the latter. The means for holding the work in position on the table l2 may be as desired and forms no particular part of the present invention and has not been illustrated. Screw 522 may be tightened against the spindle to maintain the latter in an elevated position when the operator leaves the machine or while work is being placed on and removed from the table it and the like. The relation of the diameters of the bushings 4 9 and 53 to thedifferent diameters of spindles has been set forth above.

Having thus set forth the nature of my invention, what I claim is:

1. In a manual tapping device, a support for work, said support having a vertical opening therethrough toward an edge and slotted from said opening through said edge, ears on said slotted portion at each side of the slot thereof, a vertical post passing through said opening, a horizontal arm on said post above said support,

a tap'spindle bushing receiving opening in the forward end portion of said arm, means for drawing said ears toward one another to have said support grip said post, andsaid post turnable about its own axis in said vertical opening to adjust the position of said arm over said sup port when said means for drawing the. ears toward one another is released.

2. In a manualtapping device, a support for work, a vertical post at one side of said support,

a horizontal arm on said post above said support,

a tap spindle bushing receiving opening in the forward end portion'of said arm, a jack screw below and in vertical alignment with said post, means connecting said post and jack screw for relative turning movement but for vertical movement together, a fixed nut through which said screw is threaded whereby as the screw is turned in one direction it is raised and when turned in the other direction is lowered to raise and lower said post and the arm thereon, and means to turn said screw.

3. In a manual tapping device, a support for work, a vertical post at one side of said support, a horizontal arm on'said post above said support, a tap spindle bushing receiving opening in the forwardend portionof said arm, a jack screw below and in vertical alignment with'said post, means connecting said'post and jack screw for relative turning movement but for vertical movement together, a fixed nut through which said screw is threaded whereby as the screw is turned in one direction it is raised and when turned in the other direction is lowered to raise and lower said post and the arm thereon, and means to turn said screw, and means on said support to lock said post in the desired position of vertical adjustment.

4. In a manual tapping device, a s pport for work, a vertical post at one side of said support, a bracket on the upper end portion of said post, said bracket including a head-like part having a horizontal groove opening through a side thereof and having an inner vertical wall and top and bottom Walls angularly related to said inner wall,

a horizontal arm mounted by said bracket and rojecting therefrom over said support, said arm including an inner side surface and top and bottom surfaces angularly related to said side su face, said arin having a portion of its length disposed in said groove with its angularly re- Iated surfaces against the angularly related walls of the groove whereby the arm may not turn about its own horizontal axis While in said groove, said arm having a slot therethrough from said inner side thereof and extending for substan- 

